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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
At room temperature, the vapour pressure of water and ether will be
Choose an answer
equal
different
zero
almost same
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Question # 2
Which of the following is a reason why real gases do not behave as ideal gases do?
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real gases have intermolecular forces between the molecules
real gases do not have intermolecular forces between the molecules
real gases exist as molecules
molecules of real gases attract each other more strongly than molecules of ideal gases
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Question # 3
In the formation of NaCl crystals from its aqueous solution, its cubic shape is changed to needle like when 10% urea is present as impurity, this phenomenon is called as
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habit of crystal
polymorphism
anisotropy
cleavage
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Question # 4
Fourth structure of protein structure refers to
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Proteins formed of more than one monomer
Myoglobin is an example
Depends on covalent bonds
None of these
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Question # 5
Metals are good conductor of electricity, but their conductivity decreases by increase in temperature because
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electrons attracted strongly by the nuclei which resists their free motion
atoms form ionic bond and no free electrons
electrons go to the iocalized orbital not free
positive metal ions begin to oscillate and their motion hinders the free movement of electrons
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Question # 6
Keratin is
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Protein of tendons
Rich in sulfur
Poor in cysteine
Conjugated protein
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Question # 7
Only those metals can replace Hydrogen from dilute acids, which have
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High negative reduction potential
Low negative reduction potential
High positive reduction potential
low positive reduction potential
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Question # 8
During the electrolysis of Fused NaCI, the products are
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Na and H2
Na and Cl2
Na and O2
H2 and Cl2
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Question # 9
Which of the following is incorrect for glucose & sucrose
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Both are water solube
Natural polymers
Source of energy
Carbohydrate in nature
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Question # 10
An alkyl halide reacts with NH3 to give
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Amide
Cyanide
Amine
Aniline
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Question # 11
Enzymes consist of
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proteins only
proteins and non-protein parts
fats only
futs and non-fatty components
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Question # 12
Soft drinks and baby feeding bottles are generally made up of
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Polyester
Polyurethane
Polyurea
Polystyrene
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Question # 13
Choose an answer
Temperature is increased
Pressure is increased
HCl is added
HCl is removed
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Question # 14
Vinyl acetylene combines with HCI to form
Choose an answer
Poly acetylene
Benzene
Chloroprene
Divinylacetylene
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Question # 15
The actual number of atoms or molecules taking part in rate determining step is
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Rate of reaction
Velocity of reaction
Order of reaction
Molecularly
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Question # 16
S
N
1 reaction of alkylhalides leads to
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Retention of configuration
Recemisation
Inversion of configuration
None of these
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Question # 17
Water H
2
O is liquid while hydrogen sulphide H
2
S is a gas beause
Choose an answer
Water has higher molecular weight
Hydrogen sulphide is a weak acid
Sulphure has high electronegativity than oxyhe
Water molecules associate through hydrogen bonding
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Question # 18
Number of sigma bonds in P
4
O
10
is
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6
7
17
16
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Question # 19
A nuclophile must
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Be an atom
A group of atoms
Have a lone pair
Be negatively charged
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Question # 20
Heavy water is obtained by
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Prolonged electrolysis of water
Dissolving heavy salt in water
Simple distillation of water
Removing impurities of calcium and magnesium form water
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Question # 21
X-ray work has shown that the diameters of atom are of the order of
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8 x 10
-10
m
2 x 10
-10
m
8 x 10
-8
m
2 x 10
-8
m
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Question # 22
The electronic configuration of an atom/ion can be defined by the following
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Aufbau principle
Pauli's exclusion principle
Hund's Rule
All the above
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